/usr/include/libtgvoip/EchoCanceller.h is in libtgvoip-dev 1.0.3-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// libtgvoip is free and unencumbered public domain software.
// For more information, see http://unlicense.org or the UNLICENSE file
// you should have received with this source code distribution.
//
#ifndef LIBTGVOIP_ECHOCANCELLER_H
#define LIBTGVOIP_ECHOCANCELLER_H
#include "threading.h"
#include "BufferPool.h"
#include "BlockingQueue.h"
#include "MediaStreamItf.h"
namespace tgvoip{
class EchoCanceller{
public:
EchoCanceller(bool enableAEC, bool enableNS, bool enableAGC);
virtual ~EchoCanceller();
virtual void Start();
virtual void Stop();
void SpeakerOutCallback(unsigned char* data, size_t len);
void Enable(bool enabled);
void ProcessInput(unsigned char* data, unsigned char* out, size_t len);
void SetAECStrength(int strength);
private:
bool enableAEC;
bool enableAGC;
bool enableNS;
#ifndef TGVOIP_NO_DSP
static void* StartBufferFarendThread(void* arg);
void RunBufferFarendThread();
bool didBufferFarend;
tgvoip_mutex_t aecMutex;
void* aec;
void* splittingFilter; // webrtc::SplittingFilter
void* splittingFilterIn; // webrtc::IFChannelBuffer
void* splittingFilterOut; // webrtc::IFChannelBuffer
void* splittingFilterFarend; // webrtc::SplittingFilter
void* splittingFilterFarendIn; // webrtc::IFChannelBuffer
void* splittingFilterFarendOut; // webrtc::IFChannelBuffer
tgvoip_thread_t bufferFarendThread;
BlockingQueue<int16_t*>* farendQueue;
BufferPool* farendBufferPool;
bool running;
void* ns; // NsxHandle
void* agc;
int32_t agcMicLevel;
#endif
};
class AudioEffect{
public:
virtual ~AudioEffect()=0;
virtual void Process(int16_t* inOut, size_t numSamples)=0;
virtual void SetPassThrough(bool passThrough);
protected:
bool passThrough;
};
class AutomaticGainControl : public AudioEffect{
public:
AutomaticGainControl();
virtual ~AutomaticGainControl();
virtual void Process(int16_t* inOut, size_t numSamples);
private:
void* agc;
void* splittingFilter;
void* splittingFilterIn;
void* splittingFilterOut;
int32_t agcMicLevel;
};
};
#endif //LIBTGVOIP_ECHOCANCELLER_H
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